import { defineComponent, inject, ref, computed, watch, nextTick, onMounted, onBeforeUnmount, resolveComponent, resolveDirective, openBlock, createBlock, withCtx, withDirectives, createVNode, withModifiers, Fragment, renderList, toDisplayString, withKeys, vModelText, createCommentVNode, vShow, renderSlot } from 'vue';
import ElCascaderPanel, { CommonProps } from '../el-cascader-panel';
import ElInput from '../el-input';
import ElPopper from '../el-popper';
import ElScrollbar from '../el-scrollbar';
import ElTag from '../el-tag';
import { ClickOutside } from '../directives';
import { t } from '../locale';
import debounce from 'lodash/debounce';
import { EVENT_CODE } from '../utils/aria';
import { UPDATE_MODEL_EVENT, CHANGE_EVENT } from '../utils/constants';
import isServer from '../utils/isServer';
import { useGlobalConfig } from '../utils/util';
import { addResizeListener, removeResizeListener } from '../utils/resize-event';
import { isValidComponentSize } from '../utils/validators';
import { elFormKey, elFormItemKey } from '../el-form';

/**
 * Make a map and return a function for checking if a key
 * is in that map.
 * IMPORTANT: all calls of this function must be prefixed with
 * \/\*#\_\_PURE\_\_\*\/
 * So that rollup can tree-shake them if necessary.
 */
const EMPTY_OBJ = (process.env.NODE_ENV !== 'production')
    ? Object.freeze({})
    : {};
const EMPTY_ARR = (process.env.NODE_ENV !== 'production') ? Object.freeze([]) : [];
const isFunction = (val) => typeof val === 'function';
const isObject = (val) => val !== null && typeof val === 'object';
const isPromise = (val) => {
    return isObject(val) && isFunction(val.then) && isFunction(val.catch);
};

const DEFAULT_INPUT_HEIGHT = 40;
const INPUT_HEIGHT_MAP = {
    medium: 36,
    small: 32,
    mini: 28,
};
const popperOptions = {
    modifiers: [
        {
            name: 'arrowPosition',
            enabled: true,
            phase: 'main',
            fn: ({ state }) => {
                const { modifiersData, elements } = state;
                const { reference, arrow } = elements;
                modifiersData.arrow.x = modifiersData.arrow.x - (reference.clientWidth - arrow.clientWidth) / 2 + 35;
            },
            requires: ['arrow'],
        },
    ],
};
var script = defineComponent({
    name: 'ElCascader',
    components: {
        ElCascaderPanel,
        ElInput,
        ElPopper,
        ElScrollbar,
        ElTag,
    },
    directives: {
        Clickoutside: ClickOutside,
    },
    props: Object.assign(Object.assign({}, CommonProps), { size: {
            type: String,
            validator: isValidComponentSize,
        }, placeholder: {
            type: String,
            default: () => t('el.cascader.placeholder'),
        }, disabled: Boolean, clearable: Boolean, filterable: Boolean, filterMethod: {
            type: Function,
            default: (node, keyword) => node.text.includes(keyword),
        }, separator: {
            type: String,
            default: ' / ',
        }, showAllLevels: {
            type: Boolean,
            default: true,
        }, collapseTags: Boolean, debounce: {
            type: Number,
            default: 300,
        }, beforeFilter: {
            type: Function,
            default: () => true,
        }, popperClass: {
            type: String,
            default: '',
        } }),
    emits: [
        UPDATE_MODEL_EVENT,
        CHANGE_EVENT,
        'focus',
        'blur',
        'visible-change',
        'expand-change',
        'remove-tag',
    ],
    setup(props, { emit }) {
        let inputInitialHeight = 0;
        let pressDeleteCount = 0;
        const $ELEMENT = useGlobalConfig();
        const elForm = inject(elFormKey, {});
        const elFormItem = inject(elFormItemKey, {});
        const popper = ref(null);
        const input = ref(null);
        const tagWrapper = ref(null);
        const panel = ref(null);
        const suggestionPanel = ref(null);
        const popperVisible = ref(false);
        const inputHover = ref(false);
        const filtering = ref(false);
        const inputValue = ref('');
        const searchInputValue = ref('');
        const presentTags = ref([]);
        const suggestions = ref([]);
        const isDisabled = computed(() => props.disabled || elForm.disabled);
        const realSize = computed(() => props.size || elFormItem.size || $ELEMENT.size);
        const tagSize = computed(() => ['small', 'mini'].includes(realSize.value) ? 'mini' : 'small');
        const multiple = computed(() => !!props.props.multiple);
        const readonly = computed(() => !props.filterable || multiple.value);
        const searchKeyword = computed(() => multiple.value ? searchInputValue.value : inputValue.value);
        const checkedNodes = computed(() => { var _a; return ((_a = panel.value) === null || _a === void 0 ? void 0 : _a.checkedNodes) || []; });
        const clearBtnVisible = computed(() => {
            if (!props.clearable ||
                isDisabled.value ||
                filtering.value ||
                !inputHover.value)
                return false;
            return !!checkedNodes.value.length;
        });
        const presentText = computed(() => {
            const { showAllLevels, separator } = props;
            const nodes = checkedNodes.value;
            return nodes.length
                ? multiple.value ? ' ' : nodes[0].calcText(showAllLevels, separator)
                : '';
        });
        const checkedValue = computed({
            get() {
                return props.modelValue;
            },
            set(val) {
                var _a;
                emit(UPDATE_MODEL_EVENT, val);
                emit(CHANGE_EVENT, val);
                (_a = elFormItem.formItemMitt) === null || _a === void 0 ? void 0 : _a.emit('el.form.change', [val]);
            },
        });
        const popperPaneRef = computed(() => {
            var _a;
            return (_a = popper.value) === null || _a === void 0 ? void 0 : _a.popperRef;
        });
        const togglePopperVisible = (visible) => {
            if (isDisabled.value)
                return;
            visible = visible !== null && visible !== void 0 ? visible : !popperVisible.value;
            if (visible !== popperVisible.value) {
                popperVisible.value = visible;
                input.value.input.setAttribute('aria-expanded', visible);
                if (visible) {
                    updatePopperPosition();
                    nextTick(panel.value.scrollToExpandingNode);
                }
                else if (props.filterable) {
                    const { value } = presentText;
                    inputValue.value = value;
                    searchInputValue.value = value;
                }
                emit('visible-change', visible);
            }
        };
        const updatePopperPosition = () => {
            nextTick(popper.value.update);
        };
        const hideSuggestionPanel = () => {
            filtering.value = false;
        };
        const genTag = (node) => {
            const { showAllLevels, separator } = props;
            return {
                node,
                key: node.uid,
                text: node.calcText(showAllLevels, separator),
                hitState: false,
                closable: !isDisabled.value && !node.isDisabled,
            };
        };
        const deleteTag = (tag) => {
            const { node } = tag;
            node.doCheck(false);
            panel.value.calculateCheckedValue();
            emit('remove-tag', node.valueByOption);
        };
        const calculatePresentTags = () => {
            if (!multiple.value)
                return;
            const nodes = checkedNodes.value;
            const tags = [];
            if (nodes.length) {
                const [first, ...rest] = nodes;
                const restCount = rest.length;
                tags.push(genTag(first));
                if (restCount) {
                    if (props.collapseTags) {
                        tags.push({
                            key: -1,
                            text: `+ ${restCount}`,
                            closable: false,
                        });
                    }
                    else {
                        rest.forEach(node => tags.push(genTag(node)));
                    }
                }
            }
            presentTags.value = tags;
        };
        const calculateSuggestions = () => {
            const { filterMethod, showAllLevels, separator } = props;
            const res = panel.value.getFlattedNodes(!props.props.checkStrictly)
                .filter(node => {
                if (node.isDisabled)
                    return false;
                node.calcText(showAllLevels, separator);
                return filterMethod(node, searchKeyword.value);
            });
            if (multiple.value) {
                presentTags.value.forEach(tag => {
                    tag.hitState = false;
                });
            }
            filtering.value = true;
            suggestions.value = res;
            updatePopperPosition();
        };
        const focusFirstNode = () => {
            var _a;
            let firstNode = null;
            if (filtering.value && suggestionPanel.value) {
                firstNode = suggestionPanel.value.$el.querySelector('.el-cascader__suggestion-item');
            }
            else {
                firstNode = (_a = panel.value) === null || _a === void 0 ? void 0 : _a.$el.querySelector('.el-cascader-node[tabindex="-1"]');
            }
            if (firstNode) {
                firstNode.focus();
                !filtering.value && firstNode.click();
            }
        };
        const updateStyle = () => {
            var _a;
            const inputInner = input.value.input;
            const tagWrapperEl = tagWrapper.value;
            const suggestionPanelEl = (_a = suggestionPanel.value) === null || _a === void 0 ? void 0 : _a.$el;
            if (isServer || !inputInner)
                return;
            if (suggestionPanelEl) {
                const suggestionList = suggestionPanelEl.querySelector('.el-cascader__suggestion-list');
                suggestionList.style.minWidth = inputInner.offsetWidth + 'px';
            }
            if (tagWrapperEl) {
                const { offsetHeight } = tagWrapperEl;
                const height = Math.max(offsetHeight + 6, inputInitialHeight) + 'px';
                inputInner.style.height = height;
                updatePopperPosition();
            }
        };
        const getCheckedNodes = (leafOnly) => {
            return panel.value.getCheckedNodes(leafOnly);
        };
        const handleExpandChange = (value) => {
            updatePopperPosition();
            emit('expand-change', value);
        };
        const handleKeyDown = (e) => {
            switch (e.code) {
                case EVENT_CODE.enter:
                    togglePopperVisible();
                    break;
                case EVENT_CODE.down:
                    togglePopperVisible(true);
                    nextTick(focusFirstNode);
                    event.preventDefault();
                    break;
                case EVENT_CODE.esc:
                case EVENT_CODE.tab:
                    togglePopperVisible(false);
                    break;
            }
        };
        const handleClear = () => {
            panel.value.clearCheckedNodes();
            togglePopperVisible(false);
        };
        const handleSuggestionClick = (node) => {
            const { checked } = node;
            if (multiple.value) {
                panel.value.handleCheckChange(node, !checked, false);
            }
            else {
                !checked && panel.value.handleCheckChange(node, true, false);
                togglePopperVisible(false);
            }
        };
        const handleDelete = () => {
            const tags = presentTags.value;
            const lastTag = tags[tags.length - 1];
            pressDeleteCount = searchInputValue.value ? 0 : pressDeleteCount + 1;
            if (!lastTag || !pressDeleteCount)
                return;
            if (lastTag.hitState) {
                deleteTag(lastTag);
            }
            else {
                lastTag.hitState = true;
            }
        };
        const handleFilter = debounce(() => {
            const { value } = searchKeyword;
            if (!value)
                return;
            const passed = props.beforeFilter(value);
            if (isPromise(passed)) {
                passed.then(calculateSuggestions)
                    .catch(() => { });
            }
            else if (passed !== false) {
                calculateSuggestions();
            }
            else {
                hideSuggestionPanel();
            }
        }, props.debounce);
        const handleInput = (val, e) => {
            !popperVisible.value && togglePopperVisible(true);
            if (e === null || e === void 0 ? void 0 : e.isComposing)
                return;
            val ? handleFilter() : hideSuggestionPanel();
        };
        watch(filtering, updatePopperPosition);
        watch([checkedNodes, isDisabled], calculatePresentTags);
        watch(presentTags, () => nextTick(updateStyle));
        watch(presentText, val => inputValue.value = val, { immediate: true });
        onMounted(() => {
            const inputEl = input.value.$el;
            inputInitialHeight = (inputEl === null || inputEl === void 0 ? void 0 : inputEl.offsetHeight) || INPUT_HEIGHT_MAP[realSize.value] || DEFAULT_INPUT_HEIGHT;
            addResizeListener(inputEl, updateStyle);
        });
        onBeforeUnmount(() => {
            removeResizeListener(input.value.$el, updateStyle);
        });
        return {
            popperOptions,
            popper,
            popperPaneRef,
            input,
            tagWrapper,
            panel,
            suggestionPanel,
            popperVisible,
            inputHover,
            filtering,
            presentText,
            checkedValue,
            inputValue,
            searchInputValue,
            presentTags,
            suggestions,
            isDisabled,
            realSize,
            tagSize,
            multiple,
            readonly,
            clearBtnVisible,
            t,
            togglePopperVisible,
            hideSuggestionPanel,
            deleteTag,
            focusFirstNode,
            getCheckedNodes,
            handleExpandChange,
            handleKeyDown,
            handleClear,
            handleSuggestionClick,
            handleDelete,
            handleInput,
        };
    },
});

const _hoisted_1 = {
  key: 0,
  ref: "tagWrapper",
  class: "el-cascader__tags"
};
const _hoisted_2 = {
  key: 0,
  class: "el-icon-check"
};
const _hoisted_3 = { class: "el-cascader__empty-text" };

function render(_ctx, _cache, $props, $setup, $data, $options) {
  const _component_el_input = resolveComponent("el-input");
  const _component_el_tag = resolveComponent("el-tag");
  const _component_el_cascader_panel = resolveComponent("el-cascader-panel");
  const _component_el_scrollbar = resolveComponent("el-scrollbar");
  const _component_el_popper = resolveComponent("el-popper");
  const _directive_clickoutside = resolveDirective("clickoutside");

  return (openBlock(), createBlock(_component_el_popper, {
    ref: "popper",
    visible: _ctx.popperVisible,
    "onUpdate:visible": _cache[16] || (_cache[16] = $event => (_ctx.popperVisible = $event)),
    "manual-mode": "",
    placement: "bottom-start",
    "popper-class": `el-cascader__dropdown ${_ctx.popperClass}`,
    "popper-options": _ctx.popperOptions,
    "stop-popper-mouse-event": false,
    transition: "el-zoom-in-top",
    "gpu-acceleration": false,
    effect: "light",
    pure: "",
    onAfterLeave: _ctx.hideSuggestionPanel
  }, {
    trigger: withCtx(() => [
      withDirectives(createVNode("div", {
        class: [
          'el-cascader',
          _ctx.realSize && `el-cascader--${_ctx.realSize}`,
          { 'is-disabled': _ctx.isDisabled }
        ],
        onClick: _cache[10] || (_cache[10] = () => _ctx.togglePopperVisible(_ctx.readonly ? undefined : true)),
        onKeydown: _cache[11] || (_cache[11] = (...args) => (_ctx.handleKeyDown && _ctx.handleKeyDown(...args))),
        onMouseenter: _cache[12] || (_cache[12] = $event => (_ctx.inputHover = true)),
        onMouseleave: _cache[13] || (_cache[13] = $event => (_ctx.inputHover = false))
      }, [
        createVNode(_component_el_input, {
          ref: "input",
          modelValue: _ctx.inputValue,
          "onUpdate:modelValue": _cache[3] || (_cache[3] = $event => (_ctx.inputValue = $event)),
          modelModifiers: { trim: true },
          placeholder: _ctx.placeholder,
          readonly: _ctx.readonly,
          disabled: _ctx.isDisabled,
          "validate-event": false,
          size: _ctx.realSize,
          class: { 'is-focus': _ctx.popperVisible },
          onFocus: _cache[4] || (_cache[4] = e => _ctx.$emit('focus', e)),
          onBlur: _cache[5] || (_cache[5] = e => _ctx.$emit('blur', e)),
          onInput: _ctx.handleInput
        }, {
          suffix: withCtx(() => [
            (_ctx.clearBtnVisible)
              ? (openBlock(), createBlock("i", {
                  key: "clear",
                  class: "el-input__icon el-icon-circle-close",
                  onClick: _cache[1] || (_cache[1] = withModifiers((...args) => (_ctx.handleClear && _ctx.handleClear(...args)), ["stop"]))
                }))
              : (openBlock(), createBlock("i", {
                  key: "arrow-down",
                  class: [
                'el-input__icon',
                'el-icon-arrow-down',
                _ctx.popperVisible && 'is-reverse'
              ],
                  onClick: _cache[2] || (_cache[2] = withModifiers($event => (_ctx.togglePopperVisible()), ["stop"]))
                }, null, 2 /* CLASS */))
          ]),
          _: 1 /* STABLE */
        }, 8 /* PROPS */, ["modelValue", "placeholder", "readonly", "disabled", "size", "class", "onInput"]),
        (_ctx.multiple)
          ? (openBlock(), createBlock("div", _hoisted_1, [
              (openBlock(true), createBlock(Fragment, null, renderList(_ctx.presentTags, (tag) => {
                return (openBlock(), createBlock(_component_el_tag, {
                  key: tag.key,
                  type: "info",
                  size: _ctx.tagSize,
                  hit: tag.hitState,
                  closable: tag.closable,
                  "disable-transitions": "",
                  onClose: $event => (_ctx.deleteTag(tag))
                }, {
                  default: withCtx(() => [
                    createVNode("span", null, toDisplayString(tag.text), 1 /* TEXT */)
                  ]),
                  _: 2 /* DYNAMIC */
                }, 1032 /* PROPS, DYNAMIC_SLOTS */, ["size", "hit", "closable", "onClose"]))
              }), 128 /* KEYED_FRAGMENT */)),
              (_ctx.filterable && !_ctx.isDisabled)
                ? withDirectives((openBlock(), createBlock("input", {
                    key: 0,
                    "onUpdate:modelValue": _cache[6] || (_cache[6] = $event => (_ctx.searchInputValue = $event)),
                    type: "text",
                    class: "el-cascader__search-input",
                    placeholder: _ctx.presentText ? '' : _ctx.placeholder,
                    onInput: _cache[7] || (_cache[7] = e => _ctx.handleInput(_ctx.searchInputValue, e)),
                    onClick: _cache[8] || (_cache[8] = withModifiers($event => (_ctx.togglePopperVisible(true)), ["stop"])),
                    onKeydown: _cache[9] || (_cache[9] = withKeys((...args) => (_ctx.handleDelete && _ctx.handleDelete(...args)), ["delete"]))
                  }, null, 40 /* PROPS, HYDRATE_EVENTS */, ["placeholder"])), [
                    [
                      vModelText,
                      _ctx.searchInputValue,
                      void 0,
                      { trim: true }
                    ]
                  ])
                : createCommentVNode("v-if", true)
            ], 512 /* NEED_PATCH */))
          : createCommentVNode("v-if", true)
      ], 34 /* CLASS, HYDRATE_EVENTS */), [
        [_directive_clickoutside, () => _ctx.togglePopperVisible(false), _ctx.popperPaneRef]
      ])
    ]),
    default: withCtx(() => [
      withDirectives(createVNode(_component_el_cascader_panel, {
        ref: "panel",
        modelValue: _ctx.checkedValue,
        "onUpdate:modelValue": _cache[14] || (_cache[14] = $event => (_ctx.checkedValue = $event)),
        options: _ctx.options,
        props: _ctx.props,
        border: false,
        "render-label": _ctx.$slots.default,
        onExpandChange: _ctx.handleExpandChange,
        onClose: _cache[15] || (_cache[15] = $event => (_ctx.togglePopperVisible(false)))
      }, null, 8 /* PROPS */, ["modelValue", "options", "props", "render-label", "onExpandChange"]), [
        [vShow, !_ctx.filtering]
      ]),
      (_ctx.filterable)
        ? withDirectives((openBlock(), createBlock(_component_el_scrollbar, {
            key: 0,
            ref: "suggestionPanel",
            tag: "ul",
            class: "el-cascader__suggestion-panel",
            "view-class": "el-cascader__suggestion-list"
          }, {
            default: withCtx(() => [
              (_ctx.suggestions.length)
                ? (openBlock(true), createBlock(Fragment, { key: 0 }, renderList(_ctx.suggestions, (item) => {
                    return (openBlock(), createBlock("li", {
                      key: item.uid,
                      class: [
              'el-cascader__suggestion-item',
              item.checked && 'is-checked'
            ],
                      tabindex: -1,
                      onClick: $event => (_ctx.handleSuggestionClick(item))
                    }, [
                      createVNode("span", null, toDisplayString(item.text), 1 /* TEXT */),
                      (item.checked)
                        ? (openBlock(), createBlock("i", _hoisted_2))
                        : createCommentVNode("v-if", true)
                    ], 10 /* CLASS, PROPS */, ["onClick"]))
                  }), 128 /* KEYED_FRAGMENT */))
                : renderSlot(_ctx.$slots, "empty", { key: 1 }, () => [
                    createVNode("li", _hoisted_3, toDisplayString(_ctx.t('el.cascader.noMatch')), 1 /* TEXT */)
                  ])
            ]),
            _: 1 /* STABLE */
          }, 512 /* NEED_PATCH */)), [
            [vShow, _ctx.filtering]
          ])
        : createCommentVNode("v-if", true)
    ]),
    _: 1 /* STABLE */
  }, 8 /* PROPS */, ["visible", "popper-class", "popper-options", "onAfterLeave"]))
}

script.render = render;
script.__file = "packages/cascader/src/index.vue";

script.install = (app) => {
    app.component(script.name, script);
};
const _Cascader = script;

export default _Cascader;
